含锌电炉粉尘配碳球团的冶金特性

以某钢铁公司含锌电炉粉尘为原料,配入适当的无烟煤制成含碳球团,焙烧球团通过还原煤保护冷却至室温后进行化学分析·研究了1150℃～1300℃的范围内,温度、时间和内配煤量对锌、铁的还原速率以及球团抗压强度的影响·研究结果表明:锌、铁的还原率均随焙烧温度、焙烧时间以及内配煤量的增加而提高;抗压强度随焙烧温度、焙烧时间的增加而增高,但随内配煤量的增加出现极值点·焙烧球团最佳的工艺参数:焙烧时间为15min,内配煤量为13 04%,焙烧温度为1250℃·此时锌的还原率为98 43%,金属化率为94 51%,抗压强度为800 6N/球·

Metallurgical Characteristic of Carbon-Proportioning Pellets Mixed with Zn-Bearing Electric Arc Furnace Dust

The carbon-proportioning pellets are made from Zn-bearing EAF dust mixed with appropriate anthracite through roasting process. The influences of roasting temperature/time and proportioned quantity of coal on the metallurgical characteristics of the pellets were investigated at 1150-1300°C. The results show that the dezincification and metallization rate go up with the increase of roasting temperature/time and proportioned quantity of coal. As to the compressive strength, it also goes up with the increase of roasting temperature and time, but increases firstly then decreases with the increasing coal quantity. The best processing parameters are taking 15 min as roasting time at 1250°C with 13.04% taken as the value of the coal quantity in proportion to dust weight. Under such conditions, the dezincification rate, the metallization rate and the compressive strength of single pellet are 98.43%, 94.51 % and 800.6 N, respectively.